It is safe enough for human and pets. No smell & non toxic. It is a great toy for adults and an educational toy for children. This Fidget balls is a new toy that can cultivate children's logical thinking & Spatial imagination while playing, it can let the children leave the video games or TV programs and spend more on outdoor activities and group game, that will help children grow up happily & healthfully. When you slightly press the bubbles on the ball, the bubbles will deflate, and then you press or squeeze more bubbles, it will make a continuous"Pop" sound, this experience and feels will help you release the work or life pressure and ease your mood
